| 제목 |
Improvement of De-NOx Performance of a SCR System by Dual-Point Ammonia Injection in a Diesel Engine |
| 분야 |
Engine and Emissions |
| 언어 |
English |
| 저자 |
Hassan Raza(), Yanghwa Kim(Graduate School of Mechanical Engineering , University of Ulsan), Ock Taeck Lim(Graduate School of Mechanical Engineering , University of Ulsan), Kwang Chul Oh(Advanced Powertrain R&D Center , Korea Automotive Technology Institute), Hongsuk Kim(Department of Mobility Power Research, Korea Institute of Machinery & Materials) |
| Key Words |
Selective catalytic reaction, Dual-point ammonia injection, Close coupled SCR, NOx, Cu–zeolite catalyst, Automotive Engineering |
| 초록 |
Selective catalytic reduction (SCR) catalysts is used widely to reduce NOx emissions from diesel engines. However, improvements in de-NOx performance are required to meet future standards of near-zero NOx emissions. This study examines the effectiveness of dual-point NH3injection technology, in which gaseous NH3is injected into both closed coupled and under floor SCR catalysts. The NOx removal efficiency of dual-point NH3injection is compared with that of single-point injection in a World Harmonized Transient Cycle test. The results show that dual-point injection of NH3gas can effectively reduce NOx emissions from diesel engines due to superior temporal and spatial distribution of NH3gas in an SCR catalyst. |
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